Serial communications pinout

There are also cables with a handshaking simulation on a «stub» and partial handshaking without the ability to control the data transmission at the «hardware level». The following is the RS cable wiring with full handshaking recommended by Microsoft. At one point, the RS 9-pin Serial Port used to be a common connector on the back of every computer.

But with USB being a much better protocol and easier to use, the serial port has just about disappeared from modern desktop computers. If you want to know more about how I discovered this and the differences, then continue reading. When using the Keyspan adapter, the only caveat is that communication with the UPS is configured as using a serial cable instead of a USB cable.

This caused a bit of a problem for me. For a typical USB configuration, apcupsd. This is because apcupsd will try all the known USB ports until it succeeds.

However, when using the Keyspan USB-to-serial adapter, apcupsd. The next time the server rebooted, it could have been ttyUSB1. This was unreliable, so I wanted to figure out what the problem was with my serial connection.

After a bit of research, I learned that there were two pinout conventions used for the IDC10 header on motherboards. Once I discovered that there were two industry standard conventions in use for the IDC COM header connector pinout, my problem was solved. A quick fix was to buy the correct adapter. Even quicker, I warmed up the soldering iron and re-wired my adapter in less than ten minutes. Custom COM port pinout preset can be selected and saved by a user in the software settings.

Data on RS is normally sent using signal lines, which have the following meanings: RTS Request to Send — request for data exchange indicating that the data set is ready to send information to the DTE; CTS Clear to Send — a positive voltage signal indicating that a modem is able to receive data from the data terminal and that the DTE can start data transfer. Get a download link for your desktop Submit your email address to get a link for quick download on your desktop and get started!

The download link was sent to you, check your email. Latest version Standard. Latest version Standard: v Category: Serial Port Software.

Demo limitations. Demo limitations: day fully-functional trial. Languages: English. Reviews [more] I purchased several converters from you guys, this one With more than 15 years of expertise in data communication U. Converters LLC offers you excellent service, support and quality. Manufacturer of most types of serial communication converters for industrial, commercial and general use.

Authorized reseller of major brands best-in-class data communication products. Simply your One-Stop Shop for serial data applications. Converters LLC. Serial Wireless Adapters. Serial - Ethernet Converters. Technical Support, Contacts and Documentation. Tweets by USconverters.